
Sadayuki Atsuji (died 1582) was an Azai retainer during the Sengoku period. He first served under Nagamasa Azai and fought at the Battle of Anegawa, and Hideyoshi Toyotomi later tricked him into defecting to the Oda. He later supported Mitsuhide Akechi during the Incident at Honnoji, leading to Sadayuki and his entire family being executed by Hideyoshi.